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Noncontrolling Interests (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Nov. 12, 2024
Nov. 12, 2022
May 29, 2018
Nov. 12, 2015
Jun. 30, 2021
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Redeemable Noncontrolling Interest [Line Items]                
Noncontrolling interests discount accretion           $ 22.7 $ 22.7 $ 25.4
3 Arts Entertainment                
Redeemable Noncontrolling Interest [Line Items]                
Deferred compensation arrangements     $ 38.3          
Contingency period           5 years    
Forecast                
Redeemable Noncontrolling Interest [Line Items]                
Call period 30 days 30 days            
3 Arts Entertainment                
Redeemable Noncontrolling Interest [Line Items]                
Put rights exercise period           60 days    
Period after expiration of put rights that call rights begin           30 days    
Call rights exercise period           60 days    
Pilgrim Media Group                
Redeemable Noncontrolling Interest [Line Items]                
Noncontrolling interests discount accretion         $ 2.7      
3 Arts Entertainment                
Redeemable Noncontrolling Interest [Line Items]                
Initial fair value of redeemable noncontrolling interests     $ 15.8          
Redeemable noncontrolling interest, ownership percentage held by noncontrolling interest holders     49.00%          
Pilgrim Media Group                
Redeemable Noncontrolling Interest [Line Items]                
Initial fair value of redeemable noncontrolling interests       $ 90.1        
Redeemable noncontrolling interest, ownership percentage held by noncontrolling interest holders       37.50%        
Pilgrim Media Group | Forecast                
Redeemable Noncontrolling Interest [Line Items]                
Portion of noncontrolling interest redeemable after first term, five years after November 12, 2015   25.00%